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Short Communication Length-Weight Relationships of 14 Fish Species from Tajan River, Southern Caspian Sea Basin, Iran

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Short Communication Length-Weight Relationships of 14 Fish Species from Tajan River, Southern Caspian Sea Basin, Iran Iran. J. Ichthyol. (December 2015), 2(4): 299–301 Received: October 13, 2015 © 2015 Iranian Society of Ichthyology Accepted: December 16, 2015 P-ISSN: 2383-1561; E-ISSN: 2383-0964 doi: http://www.ichthyol.ir Short Communication Length-weight relationships of 14 fish species from Tajan River, Southern Caspian Sea basin, Iran Jaber AAZAMI*1, Abbas ESMAILI-SARI2, Asghar ABDOLI3, Hormoz SOHRABI4, Paul J. VAN DEN BRINK5,6 1Department of Environment Sciences, Faculty of Sciences, University of Zanjan, Zanjan, Iran. 2Department of Environment, Faculty of Natural Resources, Tarbiat Modares University, Tehran, Iran. 3Department of biodiversity and Ecosystem Management, Environmental Research Institute, Shahid Beheshti University, Tehran, Iran. 4Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University, Tehran, Iran. 5Department of Aquatic Ecology and Water Quality Management, Wageningen University, Wageningen University and Research Centre, Wageningen, The Netherlands. 6Alterra, Wageningen University and Research Centre, Wageningen, The Netherlands. *Email: [email protected] Abstract: The length-weight relationships, (LWRs) were calculated for 14 fish species belonging to five families (Cyprinidae, Cobitidae, Nemacheilidae, Salmonidae, and Gobiidae) collected from the Tajan River, north of Iran. Significant length-weight relationships with high correlation coefficients were found for all species. Keywords: LWRs, Caspian Sea, Biomass Estimations. Introduction Oncorhynchus mykiss, Salmo trutta (Salmonidae), Length-weight relationships (LWRs) parameters are and Ponticola cyrius (Gobiidae). important in environmental monitoring programs especially for stock/ecological assessments, biomass Materials and Methods estimations and environmental managements (Froese Study area: Tajan River is one of the important 1998; Ozen et al. 2009; Radkhah & Eagderi 2015; freshwater ecosystems in Mazandaran province Ghanbarifardi et al. 2014; Esmaeili et al. 2014; located in the north of Iran, with a hydrographic basin Ghanbarzadeh et al. 2015). Despite the high diversity area of 4700 Km2 between 53°0'12" N to 53°06'34" of freshwater fish in rivers, little is known about the N and 36°20'48" E to 36°27'50" E. The river is biology of most of them especially in Iranian water 140km long and originates from forested mountains bodies. and continues through the different land uses The present study investigates LWRs for 14 fish especially agricultural areas of the coastal plain, species from Tajan River, including Alburnoides where rice is extensively cultivated. It eventually tabarestanensis, Barbus cyri, Capoeta capoeta, drains into the Caspian Sea. Other information of this Cyprinus carpio, Hypophthalmichthys molitrix, river have well-documented already by Aazami et al. Luciobarbus capito, Luciobarbus mursa, (2015a, b). Pseudorasbora parva, Squalius orientalis Fish sampling: The electrofishing (200-300V) and (Cyprinidae), Cobitis keyvani (Cobitidae) Blank net (6mm) were used for fishing in September Paracobitis hircanica (Nemacheilidae), 2013 and repeated in September 2014 based on Rapid 299 Iranian Journal of Ichthyology (December 2015), 2(4): 299-301 Table 1. Descriptive statistics and estimated parameters of length-weight relationships for 14 fish species, Tajan River, Iran. Species Length (Cm) W= aLb Family N G Min Max α 95% CL of α b 95%CL of b r2 Cobitidae C. keyvani 64 6.31 12.27 0.0039 0.0028-0.0071 3.17 2.98- 3.24 0.93 I A. tabarestanensis 1867 3.98 11.09 0.0187 0.0012-0.0201 3.12 2.77-3.49 0.99 I B. cyri 96 2.93 7.14 0.0001 0.0001-0.0079 2.72 2.51-2.88 0.99 A- C. capoeta 295 3.97 33.12 0.0121 0.0097-0.0217 2.83 2.69-2.97 0.98 A- C. carpio 28 5.88 36.97 0.1299 0.1102-0.1402 3.21 3.27-3.13 0.96 A+ Cyprinidae H. molitrix 6 3.37 5.09 0.042 0.0319-0.0551 3.05 2.84-3.59 0.97 I L. capito 94 3.18 8.09 0.0019 0.0006-0.0125 2.99 2.74-3.02 0.99 I L. mursa 77 4.08 9.55 0.287 0.0077-0.0334 2.91 2.81-3.01 0.96 I P. parva 5 4.6 7.5 0.0091 0.0047-0.0109 3.1 3.01-3.12 0.98 A+ S. orientalis 642 5.73 21.18 0.0108 0.0008-1.0139 3.09 2.78-3.18 0.98 I Nemacheilidae P. hircanica 7 4.21 7.79 0.0071 0.0037-0.0101 2.88 2.52-2.97 0.97 A- S. trutta 80 8.07 20.88 0.0123 0.0069-0.0247 2.93 2.78-3.15 0.99 A- Salmonidae O. mykiss 23 16.66 34.12 0.0089 0.0073-0.0115 3.23 3.14-3.39 0.99 A+ Gobiidae P. cyrius 1333 7.79 13.43 0.0670 0.0573-0.0876 2.54 2.49-2.68 0.97 A- Bioassessment Protocol, EPA (Barbour et al. 2007). In our study, the results showed a suitable Most of the fish samples were identified, measured, estimation of LWRs, whereas parameter b lied and released in situ. Seventeen fish species were between the expected ranges of 2.5-3.5 (Froese fixed in 10% formalin and transferred to the 2006). LWRs are not constant over the year and may laboratory for correct identification. Finally, total vary significantly due to biological, food availability, length (TL) to the nearest 0.1cm and total weight temporal and sampling factors, health and sex and (TW) to the nearest 0.01g of each fish specimen were none of which were considered for in this study recorded. (Hasankhani et al. 2013, Esmaeili et al. 2014). The LWRs were calculated using linear Three collected species had positive allometric regression analysis, log (TW)=log (α) + b log (TL), growth; the rainbow trout (Oncorhynchus mykiss) where a is the intercept of the regression curve and Stone moroko (Pseudorasbora parva) were (coefficient related to body form) and b the farmed and exotic fish, respectively. Also, the regression coefficient (exponent indicating isometric common carp (Cyprinus carpio) is a widespread growth) (Oliva‐Paterna et al. 2009; Froese 1998). To freshwater fish of eutrophic waters (Jackson et al. demonstrate the significant differences of the 2010). obtained b values from the expected isometric value In conclusion, this study provides basic i.e. b=3, t-test was used (Sokal & Rohlf 1987). information on LWRs for 14 species that would be Statistical analysis of the data was performed using useful for fishery biologists and managers. However, Excel and SPSS software version 19 (Licensed by more studies on fish population biology are needed Tarbiat Modares University, Iran). for better understanding of the factors effecting fish growth especially for Iranian rivers. Results and Discussion Overall, 4653 specimens of 14 different species Acknowledgements belonging to five families were collected. Descriptive We would like to thank our friends that have given us statistics and estimated parameters of LWRs for14 any help in the sampling period especially S. Pakzad, species in seven families are presented in Table 1. All A. Kazemi, R. Ghosi, H. Malvandi, and E. Khaki. In LWRs were significant for these species (P<0.001), fact, the report is part of the PhD thesis of Jaber with r2 values greater than 0.92. Aazami entitled “Usability of Fish and 300 Aazami et al.-Length-weight relationships of 14 fish species from Tajan River Macroinvertebrate Indices in Ecological Integrity Soofiani, N. 2013. Length‐weight relationships of Assessment of Tajan River” and is supported by three cyprinid fishes from Sirwan River, Kurdistan Tarbiat Modares University, Iran. and Kermanshah provinces in western Iran. Journal of Applied Ichthyology 29(5): 1170-71. References Jackson, Z.J.; Quist, M.C.; Downing, J.A. & Larscheid, J.G. 2010. Common carp (Cyprinus carpio), sport Aazami, J.; Esmaili-Sari, A.; Abdoli, A.; Sohrabi, H. & fishes, and water quality: ecological thresholds in Van den Brink, P.J. 2015a. Monitoring and agriculturally eutrophic lakes. Lake and Reservoir assessment of water health quality in the Tajan Management 26(1): 14-22. River, Iran using physicochemical, fish and Oliva‐Paterna, F.; Torralva, M. & Carvalho, E. 2009. macroinvertebrates indices. Journal of Length–weight relationships for 20 species Environmental Health Science and Engineering collected in the Jurumirim reservoir (Paranapanema 13(1): 260-69. Basin, Brazil). Journal of Applied Ichthyology Aazami, J.; Sari, A.E.; Abdoli, A.; Sohrabi, H. & Van den 25(3): 360-61. Brink, P.J. 2015b. Assessment of ecological quality Ozen, O.; Ayyildiz, H.; Oztekin, A. & Altin, A. 2009. of the Tajan River in Iran using a multimetric Length–weight relationships of 17 less‐studied fish macroinvertebrate index and species traits. species from Çanakkale, Marmara region of Environmental management 5(6): 1-10. Turkey. Journal of Applied Ichthyology 25(2): 238- Barbour, M.T.; Gerritsen, J.; Snyder, B.D. & Stribling, 39. J.B. 2007. Rapid bioassessment protocols for use in Radkhah, A. & Eagderi, S. 2015. Length-weight and sreams and river: Pryphyton, Benthic length-length relationships and condition factor of Macroinvertebrates and fish. 2nd edition 841-B-99- six cyprinid fish species of Zarrineh River (Urmia 002. USEPA, Washington D.C. 408p. Lake basin, Iran). Iranian Journal of Ichthyology Esmaeili, H.; Gholamifard, A.; Vatandoust, S.; 2(1): 61-64. Sayyadzadeh, G.; Zare, R. & Babaei, S. 2014. Sokal, R.R. & Rohlf, F.J. 1987. Introduction to Length–weight relationships for 37 freshwater fish Biostatistics. 3rd Edition. New York. USA. species of Iran. Journal of Applied Ichthyology 30(5): 1073-76. Froese, R. 1998. Length‐weight relationships for 18 less‐ studied fish species. Journal of Applied Ichthyology 14(1): 117-21. Froese, R. 2006. Cube law, condition factor and weight– length relationships: history, meta‐analysis and recommendations. Journal of Applied Ichthyology 22(4): 241-53.
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